diff --git a/bin/dither/dither.rb b/bin/dither/dither.rb
index d4024e3..7e35e1f 100644
--- a/bin/dither/dither.rb
+++ b/bin/dither/dither.rb
@@ -14,6 +14,7 @@ get "/*" do |path|
   content_type "image/#{FORMAT}"
 
   geometry = params["geo"] unless params["geo"] == ""
+  geometry.gsub!(/\d+/) { |n| n.to_i * 2 } if geometry && !DITHER
 
   decrypted = %x(
     openssl \